Coffee machine



FIG. 1 is a front elevational view of my new design relating to a coffee machine;

FIG. 2 is a right side lateral view thereof;

FIG. 3 is a left side lateral view thereof;

FIG. 4 is a rear elevational view thereof.

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a sectional view thereof, taken along line 7—7 of FIG. 1. 

The ornamental design for a coffee machine, substantially as shown and described. 